Weak infinite powers of Blaschke products
Weak infinite powers of Blaschke products
复制标题
Blaschke 产品的弱无限威力
DOI:
10.1007/bf02788696
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
K. Izuchi
中科院分区:
文献类型:
--
作者:
K. Izuchi
Letbbe a Blaschke product with zeros {zn} in the open unit disk Δ. Letbe the set of sequences of non-negative integersp=(p1,p2,…) such that ∑n=1∞pn(1 − |zn|) < ∞ andpn→∞ asn→∞. We study the class of weak infinite powers ofb,Properties of these classes depend on the setS(b)of the cluster points in ∂Δ of {zn}. It is proved thatS(b)=∂Δ if and only if, the Douglas algebra generated by. Also, it is proved thatdθ(S(b))=0 if and only if there exists an interpolating Blaschke productBsuch that.